Module futures_util::future

Futures

This module contains a number of functions for working with Futures, including the FutureExt trait which adds methods to Future types.

Structs

AbortHandle	A handle to a Abortable future.
AbortRegistration	A registration handle for a Abortable future. Values of this type can be acquired from AbortHandle::new and are used in calls to Abortable::new.
Abortable	A future which can be remotely short-circuited using an AbortHandle.
Aborted	Indicator that the Abortable future was aborted.
CatchUnwind	Future for the catch_unwind combinator.
Empty	A future which is never resolved.
Flatten	Future for the flatten combinator.
FlattenStream	Future for the flatten_stream combinator, flattening a future-of-a-stream to get just the result of the final stream as a stream.
Fuse	A future which "fuses" a future once it's been resolved.
Inspect	Do something with the item of a future, passing it on.
IntoStream	A type which converts a Future into a Stream containing a single element.
Join	Future for the join combinator, waiting for two futures to complete.
Join3	Future for the join3 combinator, waiting for three futures to complete.
Join4	Future for the join4 combinator, waiting for four futures to complete.
Join5	Future for the join5 combinator, waiting for five futures to complete.
Lazy	A future which, when polled, invokes a closure and yields its result.
Map	Future for the map combinator, changing the type of a future.
OptionFuture	A future representing a value which may or may not be present.
PollFn	A future which wraps a function returning Poll.
Ready	A future that is immediately ready with a value
Shared	A future that is cloneable and can be polled in multiple threads. Use Future::shared() method to convert any future into a Shared future.
Then	Future for the then combinator, chaining computations on the end of another future regardless of its outcome.
UnitError	Future for the unit_error combinator, turning a Future into a TryFuture.
WithSpawner	Future for the with_spawner combinator, assigning a Spawn to be used when spawning other futures.

Enums

MaybeDone

A future that may have completed.

Traits

FutureExt

An extension trait for Futures that provides a variety of convenient adapters.

Functions

abortable	Creates a new Abortable future and a AbortHandle which can be used to stop it.
empty	Creates a future which never resolves, representing a computation that never finishes.
err	Create a future that is immediately ready with an error value.
lazy	Creates a new future that allows delayed execution of a closure.
maybe_done	Wraps a future into a MaybeDone
ok	Create a future that is immediately ready with a success value.
poll_fn	Creates a new future wrapping around a function returning Poll.
ready	Create a future that is immediately ready with a value.